QUEST DIAGNOSTICS INCORPORATED | |||
By: | /s/ William J. O’Shaughnessy, Jr. | ||
Name: | William J. O’Shaughnessy, Jr. | ||
Title: | Assistant General Counsel and Secretary | ||
Date: | May 16, 2011 |
SPARK ACQUISITION CORPORATION | |||
By: | /s/ Robert A. Hagemann | ||
Name: | Robert A. Hagemann | ||
Title: | President | ||
Date: | May 16, 2011 |